[runtime] Fix for IsMethod() with NULL argument (TECH-VUS99D7UMJ)
[runtime] Fix for IsMethod() with NULL argument (TECH-VUS99D7UMJ)

X-Sharp/XSharpPublic,X-Sharp/XSharpPublic,X-Sharp/XSharpPublic,X-Sharp/XSharpPublic,X-Sharp/XSharpPublic